The Caloris Basin found on Mercury was probably formed by what process?
A. an impact from a planetesimal
B. volcanic activity
C. erosion from solar wind
D. plate tectonics
Answer: A
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The kind of waves that travel fastest through a long metal rod have
A) short wavelengths. B) waves of medium length. C) long wavelengths. D) all have the same speed
A series of 3 uncharged concentric shells surround a small central charge q. The charge distributed on the outside of the third shell is
a. ?3q. b. ?(ln 3)q. c. +q. d. +(ln 3)q. e. +3q.
In the standard model, about when after the Big Bang did the universe become transparent to radiation?
A) 10-43 s B) 10-35 s C) 103 s D) 3 × 105 y E) 3 × 106 y
The coefficient of static friction between the tires of a car and the street is µs = 0.58 . Of the following, what is the steepest inclination angle of a street on which a car can be parked (with wheels locked) without slipping?
a. 22.5° c. 38° b. 30° d. 45°